item_class.hh

説明を見る。

#ifndef ITEM_CLASS_HH_
# define ITEM_CLASS_HH_

# include <map>
# include <iostream>

# include "objects_fwd.hh"

# define UNKNOWN_ITEM_CLASS (-1)

namespace objects
{
  class ItemClassFactory
  {
  public:
    ItemClassFactory();
    ~ItemClassFactory();
    
    static ItemClassFactory &get_instance();
    const ItemClass &get(int id);

  protected:
    std::map<int, ItemClass *> _item_class_map;

    void register_item(ItemClass &i);
  };

  class ItemClass
  {
  public:
    ItemClass();

    static const ItemClass &get(int id);
    virtual void accept(ItemVisitor &iv) = 0;
    virtual void print(std::ostream &os) = 0;

    virtual int get_id() const = 0;
    virtual const std::string &get_name() = 0;
  };

  template<int ITEM_CLASS_ID>
  class DefItemClass : public ItemClass
  {
  public:
    DefItemClass();

    static const int id = ITEM_CLASS_ID;

    void accept(ItemVisitor &iv);
    int get_id() const;
    const std::string &get_name();
    void print(std::ostream &os);
  };

  std::ostream &operator <<(std::ostream &os, const ItemClass &ic);
}

# include "item_class.hxx"

#endif

---